220121012211212 has 24 divisors (see below), whose sum is σ = 440371014365856. Its totient is φ = 94309935959808.

The previous prime is 220121012211197. The next prime is 220121012211223. The reversal of 220121012211212 is 212112210121022.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1151598653 + ... + 1151789780.

It is an arithmetic number, because the mean of its divisors is an integer number (18348792265244).

Almost surely, 2^{220121012211212} is an apocalyptic number.

It is an amenable number.

220121012211212 is an abundant number, since it is smaller than the sum of its proper divisors (220250002154644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220121012211212 is a wasteful number, since it uses less digits than its factorization.

220121012211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303391857 (or 2303391855 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 220121012211212 its reverse (212112210121022), we get a palindrome (432233222332234).

The spelling of 220121012211212 in words is "two hundred twenty trillion, one hundred twenty-one billion, twelve million, two hundred eleven thousand, two hundred twelve".